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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Diodes Incorporated PT7A7514WE

Name: PT7A7514WE
Brand: Diodes Incorporated
SKU: PT7A7514WE
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PT7A7514WE

Manufacturer:: Diodes Incorporated

Category:: Supervisors

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: PT7A7514WE.pdf

Description:: IC SUPERVISOR 1 CHANNEL 8SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PT7A7514WE from Diodes Incorporated is a precision μP supervisor IC designed for power-up, brownout, and power-fail monitoring in microprocessor systems. It features a 2.93V reset threshold, 200ms active-low reset pulse width, debounced manual reset input, independent 1.6s watchdog timer, and 1.25V power-fail comparator - deployed in embedded industrial controllers requiring reliable supply supervision.

For engineers reviewing the PT7A7514WE datasheet, PT7A7514WE pinout, PT7A7514WE application, or PT7A7514WE equivalent, key selection criteria include reset threshold accuracy (±1.5%), guaranteed RESET validity down to V_CC = 1.2V, WDI edge-sensitive watchdog timing, and SOIC-8 compatibility with TTL/CMOS logic interfaces.

Technical Context

The PT7A7514WE implements a precision bandgap-based voltage monitor with 2.93V nominal reset threshold (±1.5% over −40°C to +85°C), coupled to a monostable reset generator delivering a guaranteed 200ms low-active pulse. Its manual reset input (MR) accepts TTL/CMOS logic levels and includes internal 250µA pull-up for switch debouncing.

A dedicated watchdog circuit monitors WDI transitions with 1.6s timeout (typical), clearing automatically on MR assertion or RESET activation; WDO asserts low on timeout or during V_CC undervoltage, while PFI/PFO provide independent 1.25V threshold detection for power-fail or low-battery warning signals.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold	2.93V ±1.5% - ensures reliable reset assertion during 3.3V system brownout before critical logic fails.
Reset Pulse Width	200ms (160–280ms) - meets minimum reset hold time for ARM Cortex-M0/M3 and legacy 8051 microcontrollers.
Watchdog Timeout	1.6s (1.2–2.25s) - provides sufficient margin for firmware watchdog service intervals in real-time control loops.
Power-Fail Threshold	1.25V ±20mV - enables accurate battery voltage monitoring down to single-cell Li-ion or alkaline cutoff.
V_CC Operating Range	3.0V to 5.5V - supports dual-rail 3.3V/5V systems without external level-shifting.
Supply Current	30µA typical (200µA max) - enables always-on supervision in battery-backed applications with <1-year shelf life.
RESET Validity	Guaranteed at V_CC ≥ 1.2V - ensures deterministic reset behavior during deep brownout recovery.

Pinout & Package

PT7A7514WE is housed in an industry-standard 8-pin SOIC (W), 150mil wide, RoHS-compliant package with gull-wing leads and 1.27mm pitch.

Pin/Terminal	Circuit Role	Design Meaning
1 (MR)	Manual Reset Input	Active-low TTL/CMOS-compatible trigger; internal 250µA pull-up enables push-button use without external resistor.
2 (V_CC)	Positive Supply	Primary power rail input (3.0–5.5V); powers all internal comparators, timers, and output drivers.
3 (GND)	Ground Reference	Common return path for all analog and digital functions; must be low-impedance for noise immunity.
4 (PFI)	Power-Fail Input	Monitors external voltage divider; asserts PFO low when input falls below 1.25V reference.
5 (WDO)	Watchdog Output	Open-drain active-low signal indicating watchdog timeout or V_CC undervoltage; requires external pull-up.
6 (RESET)	Reset Output	Active-low open-drain output; pulses low for 200ms on power-up/brownout and remains valid down to 1.2V V_CC.
7 (WDI)	Watchdog Input	Edge-sensitive input; rising/falling edges reset 1.6s timer; floating disables watchdog function.
8 (PFO)	Power-Fail Output	Open-drain active-low output signaling PFI < 1.25V; used for battery-low alerts or auxiliary shutdown sequencing.

Key Features

Feature	Design Value
Precision Voltage Monitoring	2.93V reset threshold with ±1.5% tolerance ensures consistent brownout response across temperature and supply variance.
Guaranteed Low-Voltage Operation	RESET remains functional down to V_CC = 1.2V - critical for safe recovery in ultra-low-power wake-up sequences.
Integrated Watchdog Timer	1.6s timeout with edge-triggered WDI eliminates need for external RC timing components in safety-critical firmware.
Dual-Function Power-Fail Detection	Independent 1.25V comparator (PFI/PFO) supports both battery monitoring and auxiliary supply fault signaling.
Debounced Manual Reset	Internal 250µA pull-up and 200ms pulse width eliminate external debounce circuitry for front-panel reset buttons.

Applications

Industrial PLC Controller

Smart Energy Meter

Use Scenario: Microcontroller-based programmable logic controller operating in unregulated 24VDC field environments with transient surges and brownouts.

IC Role / Device Role / Timing Role: Supervisor IC asserting active-low RESET during V_CC dips below 2.93V and generating 200ms hold time for deterministic firmware restart.

Use Value: Prevents corrupted register writes and state machine lockup during factory floor power disturbances.

Use Scenario: Battery-backed electricity meter with real-time clock and tamper detection requiring long-term reliability under variable grid conditions.

IC Role / Device Role / Timing Role: Dual-role supervisor: monitors main 3.3V rail via RESET and detects battery depletion via PFI/PFO at 1.25V threshold.

Use Value: Enables graceful shutdown and non-volatile event logging before backup power exhaustion.

Automotive Body Control Module

Medical Diagnostic Handheld

Use Scenario: 12V-to-3.3V powered body control unit exposed to load-dump transients and cold-crank undervoltage events.

IC Role / Device Role / Timing Role: Brownout detector with 2.93V threshold and 200ms reset pulse ensuring MCU reset integrity during engine start cycles.

Use Value: Eliminates spurious CAN bus errors caused by marginal V_CC during cranking.

Use Scenario: Portable ultrasound or glucose monitor with lithium coin-cell backup and strict regulatory uptime requirements.

IC Role / Device Role / Timing Role: Combines watchdog supervision (WDI/WDO) and power-fail warning (PFI/PFO) to enforce firmware health checks and battery alerting.

Use Value: Meets IEC 62304 Class B software safety requirements through hardware-enforced reset and timeout mechanisms.

Equivalent & Alternatives

The following parts are listed as comparable options for similar μP supervisor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX6326UT29D3+T	2.93V reset threshold, 200ms pulse, no watchdog, SOT23-5 package	Lacks WDI/WDO and PFI/PFO; suitable only for basic reset-only use cases	Select when board space is constrained and watchdog/power-fail functions are handled elsewhere.
TPS3808G33DBVR	3.3V reset threshold, adjustable delay, no PFI/PFO, 6-pin SOT23	Higher threshold incompatible with 3.3V brownout detection; no power-fail comparator	Choose only if system operates strictly above 3.0V and requires programmable reset delay.

Compared with MAX6326UT29D3+T and TPS3808G33DBVR, PT7A7514WE uniquely integrates 2.93V precision reset, 1.6s watchdog, and 1.25V power-fail detection in a single SOIC-8 package - enabling compact, feature-complete supervision without external components.

Availability

PT7A7514WE is available at Aetrix Electronics and suitable for industrial PLC controllers, smart energy meters, automotive body control modules, and medical handheld diagnostics requiring stable component supply and long-lifecycle support.

Supply support for PT7A7514WE includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions.

The PT7A75xx family targets microprocessor system reliability, delivering integrated voltage monitoring, reset generation, watchdog timing, and power-fail detection for industrial, automotive, and medical embedded applications.

FAQ

What is the minimum V_CC required for PT7A7514WE to assert a valid RESET signal?

The PT7A7514WE guarantees RESET functionality down to V_CC = 1.2V, with output voltage ≤0.4V under 3.2mA sink load. This ensures deterministic reset behavior during deep brownout recovery, even when main supply collapses below typical logic thresholds.

Can the watchdog timer be disabled without removing the WDI connection?

Yes - leaving WDI floating or connecting it to a high-impedance three-state buffer disables the watchdog timer. The internal timer remains cleared and inactive until WDI is actively driven high or low with defined edges.

How does the PFI/PFO function differ from the main reset circuitry?

PFI/PFO operates independently of the reset threshold: it compares external voltage against a fixed 1.25V reference and asserts PFO low when PFI drops below that value. Unlike RESET, it has no timing delay or hysteresis and can be used for battery monitoring or auxiliary supply fault signaling.

Is PT7A7514WE qualified for automotive applications per AEC-Q100?

No - PT7A7514WE is not AEC-Q100 qualified. Diodes Incorporated offers separate AEC-Q100-qualified supervisors (e.g., APX803L series) for automotive use; this device is intended for industrial, medical, and commercial applications.

PT7A7514WE Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 2.93V

Output:: Push-Pull, Totem Pole

Reset:: Active Low

Reset Timeout:: 160ms Minimum

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

PT7A7514WE FAQ

1.How can I place an order for PT7A7514WE through Aetrix?

Please submit a Request for Quotation (RFQ) for PT7A7514WE on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for PT7A7514WE reliable?

The price and inventory of PT7A7514WE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT7A7514WE is usually 5 days.

3.What payment methods are accepted for PT7A7514WE?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PT7A7514WE transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PT7A7514WE?

PT7A7514WE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PT7A7514WE order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for PT7A7514WE?

For technical support, including PT7A7514WE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT7A7514WE requirements.

6.How does Aetrix verify that PT7A7514WE is sourced from the original manufacturer or authorized distributors?

All PT7A7514WE products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PT7A7514WE meets industry standards.

7.What is the process for return or replacement of PT7A7514WE?

All PT7A7514WE units undergo pre-shipment inspection (PSI). If there is an issue with PT7A7514WE, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The PT7A7514WE part is unused and in its original packaging.

Return procedure for PT7A7514WE:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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